Ceiling for concrete floors



April 14, 1925. 1,533,817 c. A. SMITH CEILING FOR CONCRETE FLOORS Filed May l7, 1922 15 Figfl.

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w INVENTOR CHARLES A.SM|TH ATTYs.

Patented Apr. 14, 1925.

PATENT OFFICE.

CHARLES A. SMITH,

OF COLUMBUS, OHIO.

CEILING FOR CONCRETE FLOORS.

Application filed May 17,

To (/ZZ fui/ront 'aft may concern.'

Be it known that I, CHARLES f a citizen of the United States, residing at Columbus, in the county of Franklin and Sta-te of Chio, have invented a certain new and useful Improvement in Ceilings for Concrete Floors, of which lthe following is a specilication.

The object of this invention generally is to provide an improved ceiling for a concrete floor o't the hollow type to which the plaster may be easily applied with the assurance that it will remain in place.

' rThe invention is embodied in the example herein shown and described, the features o1' novelty being finally claimed.

ln the accompanying drawing- Figure 1 is a vertical sectional view taken transversely of the joists.

Fig. 2 is a sectional view taken at right` angles to Fig. 1, as for example upon the line Il ll Fig. 1.

Fig. 3 is a detail sectional view of the metallic mold or form with a piece of the metal lath attached thereto.

Fig. et is a detail in elevation 'looking at the right hand side of Fig. t and showing how the lath is secured.

Fig. 5 is a section like Fig. 1 showing plaster applied to the lath.

ln the views 6 designates a metallic core,

mold or dome, the 4same being ot trans-V .'ersely corrugated sheet ot inverted trough form and preferably ot' short lengths suitable for convenient handling. The margins o1" the ksides of these molds are bent to form on the inner side a` longitudinal r-ecess V- shaped in cross section and on the outer side a projection or bead. The upper wall 7 ot the bead is pierced at regular intervals with a series oit slots or holes 8 to receive tongues 9 duly provided on the metal lath i). The lower 'flange 10 ot' the V-shap-ed portion is somewhat wider than the upper wall 7 and ali'ords a seat tor the margin o1' the lath as best seen in Fig. 3.

To form the ioor the molds ory domes 6 are set end to end between girders or beams SMITH,

1922. seran No. 561,578.

Figs. 1 and 2. To strengthen and support` the joists to be formed suitable reinforcing 'rods 141 are placed in the spaces between the molds. Said rods being supported at their ends on the metallic beams. The mixture of concrete is then poured over and between the molds and allowed to harden thereby forming the iioor 15 and joists 16.

The holes 8 are made large enough to permit some trickling of soft concrete mixture through them so as to bind the edges of the lath to the mold.

After the shoring 4is removed a surface excellently adapted to receive the plaster forming the ceiling as illustrated in Fig. 5 is presented.

The forms of the parts can' be changed without departing from thel gist oi' the invention as claimed.

What I claim is.:

1. A ceiling for a concrete beam iloor including, in combination7 a sheet metal floor and beam molding core `formed with seats at the inner sides of its beam molding margins and a sheet of plaster 'lath secured between the inner sides of said margins to said seats.

2. A ceiling for' a concrete beam-floor including, in combination7 a sheet metal floor and beam molding core having its inargins bent to form longitudinal seats to re ceive the'opposite edges or a. sheet of plaster lath, and a sheetof plaster lath secured in saidbent margins at the inner sides thereof.

-8. A ceiling .tor a concrete beam Hoor including, in combination, a sheet metal floor molding core having is side margins ybent and perforated to receive tongues ot plaster lath5 and a sheet oit" plaster lath having opposite edges provided with tongues and se cured between the inner sides ot the .man gins oit the core with the tongues extended through said perit'orations and engaged with said margins.

CHARLES A. SMITH. 

